You did. All your (USA) units use metric then are converted to US measurements. The US inch is officially 25.4mm exactly.

https://www.nist.gov/pml/owm/si-units-length

Yup. And more things are SI units every day.

I use them most of time now. We are getting there slowly.

Wrapped in ham to fool the masses.

Lol, sure.

I just made sure I did my homework so I can operate with anyone.

And it was huge. I have few worries.